commit https://github.com/vim/vim/commit/cda7764d8e65325d4524e5d6c3174121eeb12cad Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jun 4 13:32:35 2016 +0200 patch 7.4.1886 Problem: When waiting for a character is interrupted by receiving channel data and the first character of a mapping was typed, the mapping times out. (Ramel Eshed) Solution: When dealing with channel data don't return from mch_inchar().